Vibration dampener



FIG. 1 is a top front perspective view of a vibration dampener;

FIG. 2 is a front elevation view thereof, the rear elevation view being a mirror image thereof;

FIG. 3 is a right elevation view thereof;

FIG. 4 is a left elevation view thereof; and,

FIG. 5 is a top elevation view thereof, the bottom elevation view being a mirror image thereof.

The broken lines shown in the drawings depict strings of a tennis racket that form no part of the claimed invention. 

CLAIM The ornamental design for a vibration dampener, as shown and described. 